We were a group of two couples on this cruise together, and had a terrific time. My opinion of Norwegian Cruise Lines, based on 3 prior cruises, was positive, but I have even higher regard for NCL after this cruise. I've outlined my thoughts on each port as well as some summary comments below.
Ephesus: "Simply Ephesus". Ephesus is a very impressive archeological site to visit - don't miss it.
Athens: "The Acropolis & Leisure". Understand that any excursion is a crapshoot - if you have a poor guide, you're in trouble. We had a poor guide in Athens - the worst I've ever had. We left the group and focused on the "leisure" time as soon as we could, and it saved the day for us. The Acropolis is a must-see destination, but I hope you have a better guide.
We loved this room. Far enough away from the stairs and elevator so there was no noise. No noise from above or below. No odd late night / early morning sounds. Good size, good layout, excellent sized bathroom. Really liked the picture window. Location mid-ship was great for getting to the restaurants and theater. Among the best rooms we've ever stayed in on a cruise ship.